Home canned foods are known to be edible a century after they were canned. Edible means it won't kill you not that it will nourish you. I too don't hesitate to eat canned goods a year or two beyond the expiration date, but this past year i decided that all my expired canned goods can go to the Food Bank and then i restock and rotate. This year I'll be sending more produce from my gardens to the Food Bank as well. Hey, you can only eat so much lettuce and it doesn't keep so things like that can be shared readily with neighbors, known and unknown.
Abundant quality food supplies is my goal now but when i started the cache i was more interested in lower costs. So now as things expire or get used i replace them with better quality foods. My new guideline is Michael Pollan's guide, to paraphrase: anything with more than 5 ingredients is not food, its a foodlike substance. Eat only real food.
my purchase priorities:
local organic or better,
local grown is better than far away organic,
know your farmer